Is Acid Blue 3 vegan?

Acid Blue 3

Vegan

Acid Blue 3 is a synthetic triarylmethane dye, calcium salt form, used as a colorant including in hair dye products, identified by Colour Index number CI 42051.

INCI name Acid Blue 3
CAS number 3536-49-0
EC number 222-573-8
CI number CI 42051
CosIng ID 87682
Last reviewed 9 July 2026

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